Fluid metering valve
First Claim
1. A fluid metering valve for outputting a fixed volume of fluid per valve actuation comprising:
- a body having a bore therein and an inlet and an outlet opening into the bore;
a cylindrical sleeve slidably disposed within the bore and having a radial port continuously communicating with the inlet;
a piston valve slidably disposed within the sleeve and cooperating therewith to define a chamber in the body;
first means for resiliently biasing the sleeve to a default position blocking the chamber from the outlet and for biasing the piston to a default position communicating the radial port with the chamber;
second means for resiliently establishing the default position of the sleeve; and
third means for establishing the default position of the piston valve.
1 Assignment
0 Petitions
Accused Products
Abstract
A fluid metering valve adaptable for outputting a fixed volume of lubricating oil from a diesel engine into an engine fuel system includes a sleeve slidably disposed in a body and a piston valve slidably disposed within the sleeve. A spring resiliently biases the sleeve to a default position blocking communication between a chamber and an outlet and the piston valve to a default position communicating an inlet with the chamber. The default position of the sleeve is established by a annular member resiliently biased into engagement with the body by another spring while the default position of the piston valve is established by another annular member urged into engagement with the body by a third spring. Movement of the piston valve toward the chamber by an input force such as a force motor initially blocks communication between the inlet and the chamber and subsequently increases the fluid pressure in the chamber to a level sufficient for moving the sleeve away from the chamber to establish communication between the outlet so that continued movement of the piston valve outputs a fixed volume of fluid.
20 Citations
11 Claims
-
1. A fluid metering valve for outputting a fixed volume of fluid per valve actuation comprising:
-
a body having a bore therein and an inlet and an outlet opening into the bore; a cylindrical sleeve slidably disposed within the bore and having a radial port continuously communicating with the inlet; a piston valve slidably disposed within the sleeve and cooperating therewith to define a chamber in the body; first means for resiliently biasing the sleeve to a default position blocking the chamber from the outlet and for biasing the piston to a default position communicating the radial port with the chamber; second means for resiliently establishing the default position of the sleeve; and third means for establishing the default position of the piston valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification